Thank you for pointing it out! It seems that for some reason URL shortener doesn't work properly. So, at the moment I can suggest the following workaround: you can use "minimaze_link":0 in the createMessage request, and the link will be delivered fine.

Please note that our developers are working to fix this issue right at the moment.

Could you please get in touch with our Support team via Contact us from on our website?
Most probably, something went wrong with the integration. However, we need to know some additional details, such as your Pushwoosh username, for instance.